PCR positivity was not associated with a higher risk for moderate-severe anaemia (OR: 1.3; 95%-CI: 0.7–2.6; P = 0.43), while children who were IgM positive had an increased risk for moderate-severe anaemia (OR: 2.6, 95%-CI: 1.3–4.9; P < 0.01). The gene discussed is CD40LG; the disease is anemia (phenotype).